What are the exact dimensions of this deep groove ball bearing?

This bearing has an inside diameter of 17 mm, an outside diameter of 30 mm, and a width of 7 mm.

What does the 2Z designation mean for this bearing?

The 2Z designation indicates that the bearing has metal shields on both sides to protect against dust and debris.

What internal clearance does this bearing have?

This model features normal radial internal clearance (CN), suitable for standard operating conditions.

What loads can the 61903-2Z accommodate?

This single row deep groove ball bearing can support both radial and axial loads in both directions.

Does this bearing require lubrication before installation?

No, the bearing is factory pre-greased, ready to install, and maintenance-free.

SKF 61903-2Z single-row groove ball bearing cylindrical 17x30x7 mm

Supplier number: SKF 61903-2Z | EAN 7316577662583

Recommended Retail Price €41.79

20.60 tax incl.

€17.02 excl. VAT (incl. all environmental contributions)

On stock - immediately available

Ordered before 20:00 - delivered tomorrow 15/10/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL

↓ Documents (1) ✆ Talk to a specialist

Smooth rotation with Skf precision bearings

Practical benefits

Dual metal shield protection: Built-in shields on both sides retain lubricant effectively while keeping out harmful dust and debris.
Low friction high speeds: You achieve quiet and low-vibration operation thanks to the precision raceways designed for high rotational performance.
Radial and axial support: The robust single row design accommodates both radial and axial loads in both directions seamlessly.

In a nutshell

The right choise for

With the Skf 61903-2Z deep groove ball bearing, you ensure smooth and reliable rotation on 17 mm rotating shafts in compact installation spaces. This single row precision bearing effortlessly accommodates both radial and axial loads in both directions. Thanks to the dual metal 2Z shields on both sides, factory lubricant stays securely inside while harmful dust and dirt particles are effectively kept out. This delivers low friction, quiet and low-vibration operation at high rotational speeds, and completely maintenance-free performance. It is the ideal choice for building or servicing compact electric motors, pumps, and mechanical drives.

Product information FAQ

€20.60

In stock - tax incl.

Key features according to our expert

Inner diameter: 17 mm
Width: 7 mm
Number of rows: 1
Sealing (bearing): Sealed on both sides
Material (bearing seal): Metal
Radial clearance: CN (Normal)
Material (bearing): Steel
Material (cage): Brass (sheet)
Bore type: Cylindrical
High temperature: No
Outer diameter: 30 mm

Product description

Single row deep groove ball bearings with seals or shields are particularly versatile, have low friction and are optimized for low noise and low vibration, which enables high rotational speeds. They accommodate radial and axial loads in both directions, are easy to mount, and require less maintenance than many other bearing types. The integral sealing can significantly prolong bearing service life because it keeps lubricant in the bearings and contaminants out.

Integral sealing prolongs bearing service life
Simple, versatile and robust design
Low friction and high-speed capability
Accommodate radial and axial loads in both directions
Require little maintenance

Documents

⤓ Technical data sheet PDF

All Features

Inner diameter: 17 mm
Width: 7 mm
Number of rows: 1
Sealing (bearing): Sealed on both sides
Material (bearing seal): Metal
Radial clearance: CN (Normal)
Material (bearing): Steel
Material (cage): Brass (sheet)
Bore type: Cylindrical
High temperature: No
Outer diameter: 30 mm
Matched arrangement: No
Tolerance class: Normal
Radial internal clearance: CN
Basic static load rating: 2.55
Material, bearing: Bearing steel
Relubrication feature: Without
Reference speed: 50000
Lubricant: Grease
Sealing type: Non-contact
Cage: Sheet metal
Locating feature, bearing outer ring: None
Filling slots: Without
Coating: Without
Sealing: Shield on both sides
Limiting speed: 26000
Bore diameter: 17
Basic dynamic load rating: 4.62
Outer diameter: 30

Brand SKF
01011348
EAN 7316577662583
Supplier number SKF 61903-2Z

Frequently asked questions about this product

Answered by specialists

What are the exact dimensions of this deep groove ball bearing?: This bearing has an inside diameter of 17 mm, an outside diameter of 30 mm, and a width of 7 mm.
What does the 2Z designation mean for this bearing?: The 2Z designation indicates that the bearing has metal shields on both sides to protect against dust and debris.
What internal clearance does this bearing have?: This model features normal radial internal clearance (CN), suitable for standard operating conditions.
What loads can the 61903-2Z accommodate?: This single row deep groove ball bearing can support both radial and axial loads in both directions.
Does this bearing require lubrication before installation?: No, the bearing is factory pre-greased, ready to install, and maintenance-free.